Karlsruhe Astrophysical Database of Nucleosynthesis in Stars
s-process
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p-process
Available isotopes for Krypton (Z=36)
  78Kr   79Kr   80Kr   81Kr   82Kr   83Kr   84Kr   85Kr   86Kr
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Recommended MACS30 (Maxwellian Averaged Cross Section @ 30keV)
83Kr 84Kr




Cross sections do not include stellar enhancement factors!
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
1.0249 ± 13--
0.0243 ± 15--

(Version 0.0 corresponds to Bao et al.)
Comment
New rec. value is weighted average of MBB05 and WLK86. Uncertainty in MBB05 is only statistical, assumed 5% total uncertainty. New MACS vs. kT table is normalized average from recently evaluated databases (jendl40, endfb71, jeff32). TENDL-2015 is discrepant. There is an additional uncertainty introduced in the MACS vs. kT table from the deviation of the evaluations, which can be as high as 10% for kT= 5 keV.
Last review: December 2016
List of all available values
originalrenorm.yeartypeCommentRef
255 ± 4
255 ± 132004cLinac, TOF, 131XeMBB05
251 ± 16
243 ± 151986rVdG, TOF, Au:B-V norm. by 613 mb/601 mb= 1.02WLK86
346.3
2015eTENDL-2015 using the TALYS codetendl15
240.8
2014eJEFF-3.2 using calculations from TENDL-2012jeff32
267.8
2011eENDF/B-VII.1endfb71
265.8
2011eJENDL-4.0jendl40
322.4
2004eJEFF-3.1jeff31
267.3
2002eJENDL-3.3jendl33
225
1971sAGM71
170
2005tMOST 2005Gor05
412
2002tMOST 2002Gor02
314
2000tNON-SMOKERRaT99
237
1986tWLK86
259
1981tHar81
540
1978tWFH78


Original:MACS [<σ v>/vT] (mb) for kT=30 keV, based on the published cross sections except where indicated otherwise.
Renorm:MACS [<σ v>/vT] (mb) for kT=30 keV for which the reference or standard cross section was meanwhile improved.
Type: The letters and numbers in the column labelled 'type' give information on how the cross section has been obtained:
cDirectly quoted from the reference itself
rRecalculated for kT = 30keV with the code described in Ref. 2 after renormalizing the original data to updated standard cross sections
eEvaluated value taken directly from the reference
sSemiempirical estimates given in the reference
tTheoretical value
MACS, SEF and Reaction Rates for different energies
Energy5keV8keV10keV15keV20keV25keV30keV40keV50keV60keV80keV100keV
MACS
848 ± 95
-
543 ± 54
410 ± 36
334 ± 25
284 ± 18
249 ± 13
203 ± 10
173 ± 8
152 ± 7
126 ± 5
109 ± 4
Xfactor0.910.840.790.720.680.650.630.610.590.580.560.56
SEF0.980.970.970.960.970.970.970.970.970.970.970.96
Rate
4.95
-
4.41
4.08
3.84
3.65
3.51
3.31
3.16
3.04
2.90
2.80

MACS:
Reference: MBB05,WLK86,jendl40,endfb71,jeff32
Procedure: 'e+t' (The MACS from kT=5 keV to 100 keV are derived from calculated cross sections, which are then normalized to experimental data, e.g. to the values at kT=25 keV obtained in activation measurements. In these cases the uncertainties should be linearly increased below 25 and above 30 keV to reach about 30% at the extreme kT values.)
Year: 2016

X-factor:
Reference: Rau12
Year: 2012

SEF (Stellar enhancement factor):
Reference: Rau09
Year: 2009
Comment:

Rate:
Reaction rate NA<σv> given in 107 cm3/mole/s, including SEF
Chart of nuclei
up
left
83Sr
1.35 d
β+
84Sr
0.56
368 mb
85Sr
64.84 d
β+
86Sr
9.86
64 mb
87Sr
7
92 mb
82Rb
1.27 m
β+
83Rb
86.20 d
β+
84Rb
33.10 d
β+
85Rb
72.17
234 mb
86Rb
18.64 d
202 mb, β-
81Kr
229.02 ka
607 mb, β+
82Kr
11.58
90 mb
83Kr
11.49
243 mb
84Kr
57
38 mb
85Kr
10.72 a
55 mb, β-
80Br
17.68 m
β-
81Br
49.31
239 mb
82Br
1.47 d
β-
83Br
2.40 h
β-
84Br
31.80 m
β-
79Se
294.99 ka
263 mb, β-
80Se
49.61
42 mb
81Se
18.45 m
β-
82Se
8.73
9 mb
83Se
22.30 m
β-
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Style: (S, M, L, XL or Alberto)


Isotope: Krypton